Tableview selection hides my button within the tableview cell

There is another question with same logic.UITableViewCell subview disappears when cell is selected i did not get correct solution which i want.They suggest to subclass view like that.But i need display button within the cell itself.

Lets come to my question:

I have a customized and programmatically created tableview.

Please take a look at the screenshots.

In this i added button programmatically to the tableview cell.

Lets come to the problem.

When i select any cell it hides the button also,I want to visible that button.

My code here :

     func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {


    var cell:UITableViewCell = tableView.dequeueReusableCellWithIdentifier("cell") as! UITableViewCell

    // here is the redbutton

           var redBtn = UIButton()
       redBtn = UIButton(frame: CGRectMake(0, 0, 40, 40))
       redBtn.backgroundColor = UIColor.redColor()
        cell.addSubview(redBtn)

    //label text just added from an array

     cell.textLabel?.textAlignment = NSTextAlignment.Center
     cell.textLabel?.text = items[indexPath.row]

     return cell

}

If need : Tableview creation code:

       var tableView: UITableView  =   UITableView()

      override func viewDidLoad() {
       super.viewDidLoad()
    tableView.frame         =   CGRectMake(0, 50, self.view.frame.width,self.view.frame.height);
    tableView.delegate      =   self
    tableView.dataSource  =  self
tableView.estimatedRowHeight = 30
 tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")

    self.view.addSubview(tableView)



}

Thanks In Advance.

Here is a solution. Give a tag number to the button.

 func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {


var cell:UITableViewCell = tableView.dequeueReusableCellWithIdentifier("cell") as! UITableViewCell

// here is the redbutton

       var redBtn = UIButton()
   redBtn = UIButton(frame: CGRectMake(0, 0, 40, 40))
   redBtn.backgroundColor = UIColor.redColor()
     cell.contentView.addSubview(redBtn)
   redBtn.tag = 101
//label text just added from an array

 cell.textLabel?.textAlignment = NSTextAlignment.Center
 cell.textLabel?.text = items[indexPath.row]

 return cell
}

Now in didSelectRowAtIndex method add this.

func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!) {

    var selectedCell = tableView.cellForRowAtIndexPath(indexPath) as UITableViewCell!

    for subViews in selectedCell.contentView.subviews {

        if subViews is UIButton && subViews.tag == 101 {
            let button = subViews as! UIButton
            selectedCell.bringSubviewToFront(button)
            button.backgroundColor = UIColor.redColor()
        }
    }
}